Archives of Physical Medicine and Rehabilitation
Volume 90, Issue 6 , Pages 1055-1060 , June 2009

Trunk Muscle Activation Patterns and Spine Kinematics When Using an Oscillating Blade: Influence of Different Postures and Blade Orientations

  • Daniel Sánchez-Zuriaga, MD, PhD

      Affiliations

    • Department of Anatomy and Human Embryology, Faculty of Medicine, University of Valencia, Valencia, Spain
    • ,
  • Francisco J. Vera-Garcia, PhD

      Affiliations

    • Area of Physical Education and Sport, Department of Health Psychology, Miguel Hernandez University of Elche, Elche, Alicante, Spain
    • ,
  • Janice M. Moreside, PT, MHK

      Affiliations

    • Spine Biomechanics Laboratory, Department of Kinesiology, University of Waterloo, Waterloo, ON, Canada
    • ,
  • Stuart M. McGill, PhD

      Affiliations

    • Spine Biomechanics Laboratory, Department of Kinesiology, University of Waterloo, Waterloo, ON, Canada
    • Corresponding Author InformationReprint requests to Stuart M. McGill, PhD, Dept of Kinesiology, 200 University Ave W, University of Waterloo, Waterloo, ON, Canada N2L 3G1

  • Image Result

    Images of 1 subject using the Bodyblade: (A) erect standing with device in vertical orientation; (B) erect standing with device in horizontal orientation; (C) erect sitting with device in vertical ori

    Images of 1 subject using the Bodyblade: (A) erect standing with device in vertical orientation; (B) erect standing with device in horizontal orientation; (C) erect sitting with device in vertical orientation; (D) erect sitting with device in horizontal orientation. Note that the vertical orientation produces medial-lateral oscillations of blade in the frontal plane, whereas the horizontal orientation generates up-down oscillations in the sagittal plane.

  • Image Result
    Averages and SDs of the mean normalized EMG amplitudes (%MVC) when using the Bodyblade in an erect standing or an erect sitting position, and with horizontal or vertical orientation of blade. Abbrevia

    Averages and SDs of the mean normalized EMG amplitudes (%MVC) when using the Bodyblade in an erect standing or an erect sitting position, and with horizontal or vertical orientation of blade. Abbreviations: AD, anterior deltoid (dashed light gray block); PM, pectoralis major (dashed dark gray block).

  • Image Result
    Vertical stand. Normalized EMG time histories of 1 typical subject for right IO (black line) and right EO (gray line) during use of the Bodyblade in standing with a vertical orientation of blade. Noti

    Vertical stand. Normalized EMG time histories of 1 typical subject for right IO (black line) and right EO (gray line) during use of the Bodyblade in standing with a vertical orientation of blade. Notice the antiphasic coactivity between the IO and EO signals.

  • Image Result
    Horizontal stand. Normalized EMG time histories of 1 typical subject for right ES at T9 (black line) and right RA (gray line) during use of the Bodyblade in standing with a vertical orientation of bla

    Horizontal stand. Normalized EMG time histories of 1 typical subject for right ES at T9 (black line) and right RA (gray line) during use of the Bodyblade in standing with a vertical orientation of blade. This is an example of the antiphasic manner in which subjects recruited the T9 ES and RA.

 Supported by the Natural Science and Engineering Research Council, Canada.

 No commercial party having a direct financial interest in the results of the research supporting this article has or will confer a benefit on the authors or on any organization with which the authors are associated.

PII: S0003-9993(09)00158-0

doi: 10.1016/j.apmr.2008.12.015

Archives of Physical Medicine and Rehabilitation
Volume 90, Issue 6 , Pages 1055-1060 , June 2009

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